Support for an Indigenous Voice to parliament has plunged over the past five months as familiarity with the referendum proposal has increased, as has a view among voters that it is distracting from bread and butter concerns.

The latest AFR/Freshwater Strategy Poll shows support for a Yes vote is just 33 per cent, a fall of 15 percentage points since May, while the No vote has 50 per cent support and 17 per cent are undecided.